of toledo



Dec. 20, 1927.

H. A. ZIOLA HANDLE LATCH FOR DOORS Filed March 11. 1927 Patented Dec. 20, 1927.

UNITED STATES PATENT OFFICE. v

.nLE RY A. ZIOLA, OF TOLEDO, OHIO, ASSIGNOR TO THE SWARTZBAUGH MANUFACTUR- ING COMPANY, OF TOLEDO, OHIO, A CORPORATION.

{HANDLE LATCH- FOR DOORS.

Application filed March 11, 1927. Serial No. 174,568.

This invention relates to improvements in fastening devices especially adapted-for use in conjunction with oven doors and the like and has as its primary object effectiveness of operation accompanied by ease in manipulation. Y

A more detailed object is the ready adustmentof the active partsfor assurlng a tight or substantially sealed joint between the door or cover and the oven or container at all times and regardless of wear.

With these and further, objects in view, as will in part hereinafter become apparent and in part stated, the invention comprises certain novel structures, combinations and arrangements of parts as will subsequently be specified and therefore particularly pointed out in the accompanying claims.

In the accompanying drawings:

Fig. 1 is a perspective view of a fragment of an even having an embodiment of the invention applied thereto, parts of the oven and its door being broken away and seen in section for disclosing structure otherwise concealed.

Fig. 2 is a top plan view thereof, the parts at one side being broken away and seen in section for disclosing parts beneath in elevation, the'parts being seen on a reduced scale.

Fig. 3 is a vertical section taken approximately on the planes indicated by line 3-3 of Fig. 2, looking in the direction of the arrows.

Fig. 4 is a front elevation of the adjustable bracket plate detached, parts being seen on an enlarged scale.

Fig. 5 is a view in side elevation of the backing plate detached and observed from within itsconvex surface.

Fig. (3 is a transverse section taken on the planes indicated by line 6-6 of Fig. 5.

Referring to the drawings by numerals, 1 indicates an oven or like housing, made up of enclosing insulating walls of nested, spaced jackets or shells 2, 2, and appropriate insulating material, such as mineral wool therebetween. The oven housing is provided with an open end adapted to be closed by a door 3, preferably made up of a similarly insulating wall. In the detailed construction of the door 3, an outer cover-- ing plate l,-preferably of sheet metal, is employed and connected at ts clrcumferential edges to an inner covering plate 5,

any ordinary which is spaced from the plate 4.- for heat insulating purposes, and the intervening area may be fllled with appropriate heat insulating materiahsuch as mineral wool or the like. Jackets 2 are connected at the end of the housing 1 by a transverse sheet or web 2" formed into a bordering rabbet or recessed seat 6 into which a substantial portion of the thickness of the door 3 is adapted to extend, as seen in Figs. 2 and 3. The outer wall of the rabbet or recessed seat 6 is formed by the meeting flange 2' of the transverse web 2" and the outer jacket 2, said flange and jacket being arranged in facecontact and being fixed together, as by, spot welding or otherwise, to form a lone gitudinally outstanding, bordering, terminal flange of housing 1. Y

The inner sheet of the door 8 has its peripheral portion flanged outwardly at 8, and the sheet 4 of door 3 has its peripheralportionflanged inwardly to meet theflange 8, and the edges of the two sheets are folded together to form a seam 7, providing a bordering bead or abutment for abutting against the exposed edge of the flange formed of the meeting sheets 2 and 2. That part of door 3 bounded by flange 8 is proportioned and located to meet and conform to the inner face of the flange 2 for enabling door3to be snugly seated in the rabbet 6 when inthe closed position.

Door 8 is adapted to be removably seated in the rabbet 6 through the employment of connecting means, such as the usual hinge connection or otherwise (not illustrated), and, when seated, is adapted to be fastened in the seated or closed position. bythe presentimproved latch and cooper.- ating parts. To this end, the outstanding terminal flange of oven 1 formed in part from flange 2 is provided with apertures 9, 9, located to register with corresponding apertures 10, 10, formed in flange 8. Parts. of the apertures 10 are'preferably slightly outward of the apertures 9 so that a wedge inserted through the registering aperture is adapted and destined to tend to force the, door 3 inward toward a more fully seated position in the rabbet 6. A divisional casing; ll is preferably arranged in themarginal portion of the door 3 about the place of the aperture 10 so as to leave an open or clearancespace 12 for the free movement of levers 14, 14. There areas many hooks 13 and levers 14as there are apertures '10, preterably two, and the levers 14 are connected by a clamping bolt 15 and spacing'handle 16 to facilitatesimultaneous manipulation of the levers 14. Levers 14 are pivoted on the same axis at 17, 17 to the outstanding cars 13, 18 of an adjustably mounted plate 19. The adjustable mounting of plate 19 is ett'ected through the provision ot'slots 20, 20 tormed'in said plate and through which slots extend the retaining screws or bolts 21, 21. Some of the slots 20 may be accommodated by upwardly outstanding extensions or cars on the plate 19, or may be formed in thebody ot the plate according to the finished appearance desired. The plate 19 is arranged at'the outer face of the outer sheet 4 of door 3, and a stiffening or anchoring plate 2 is arranged at the inner face of the sheet 4 and is of an area greater than the area of plate 9 to provide a supplemental back. For finish in appearance and adding to the stillness of the sheet 4, the said sheet may be panelled or otherwise stamped or shaped up, as best seen in Fig. 3, and the plate 22 is given a contour to conform with such shaping of sheet 4. The plate 22 is preferably provided with an oflset 23, and along its lower edge portion and above such offset, the plate is anchored to sheet 4 in any acceptable or appropriate manner, as by rivets 24, 24 extending throughthe sheet 4 and through apertures 25, 25 in plate 22. Obviously, spot welding or other means of connection may be used in lieu of the rivets. The plate 23 is formed with threaded apertures 26, 26 to receive the bolts 21, the inner end portion of each'bolt 21 extending inward beyond the plate-22 and receiving a clamping orloeking nut 27.

Plate 22 is provided with vertical slots 28 spaced longitudinally ofthe plate to correspond to the spa'cingof the rivets 14, each slot 28 registering with a corresponding slot 29 formed in and through the sheet 4 of drum The levers 14 extend through the respective registering slots 28, 29, into the area 12 and carry the wedges13, each of which upstands in hook-like shape and is provided with-a tapering or wedge nose 13' ZUMl'Wli'll anedge recess or notch 30 proportioned to receive the adjacent marginal por tions ot material surroundlng the slots 9 and 10. Upward movement of wedges 13 is limited by the edges of levers 14 contacting with the upper extremities of slots 28 and the proper relative location of the wedges 13 is obtained by adjustment of the plate 19.

Adjust'ment of plate 19 also enables the taking up of wear and insures a tight closure of the door 3, since wedges 13n1ay be thereby proportionally moved outward or in a, direction away from the ovenl, whereby the we dging engagement of the tapering ends 13' may be increased in tightness. Adjustment of plate 19 may be secured merely by loosening bolts 21, sliding the plate to the new location desired and tightening the bolts.

The upper edge portion ol plate 22 is cut- 9 erably of heat insulated material but may he of any desired substance and is of suiiieient weight, plus'the extra length of'levers 14 extended to pivots 17, to insure elevation of the wedges 13 by gravity under all normal conditions when the the levers 14 and their released. v

T he preferred operation of the structure described consists, when the door 3 is closed, of grasping the handle 16 and elevatingthe same from the position seen in full, lines in Fi ure 3 to the position shown in dotted lines therein. This action swings the inner ends of tie levers 14 downward and withdraws wedges 13 from engagement through apertunes 9 and 10. The operator the handle 16 in a direction away fron'rthe ov n 1, and the do0r3 swings or otherwise moves away from the oven. lVhen the door to be closed, the handle 16 is elevated to the dotted line position of Fig. 3 and the door 3 is .inoved toythe seated position, then the connecting parts is latch made up of then pulls on handle 16 is lowered, the lowering move n'ient causing the tapered ends or noses 13 to pass through slots 10 and enter slots 9, engaging the outer terminus ot said slots and wedging the parts for bringing the door 3 to a normal, seated position until the engaged walls of the slots enter the recesses 30 when the parts are latched closed such engagement with said recesses.

Having thusdescrib-ed my invention, what 1 claim as new and desire to secure by Let te'rs Patent or the United States, is

1. 1n mechanism or the class described the combination, with a door sheet, of a -backing plate connected to the sheet at one face, a

plate connected to-the sheet at face opposite the first mentioned plate, said sheet and first mentioned plate beingslotted, "and a lever pivoted 'to said second mentioned plate and In mechanism of" the class described,

the combination, a door she of a backing plate connected to the sheet at one face, a plate connected to the sheet at the face opposite the first mentioned plate, said sheet and first mentioned plate being slotted, and a lever pivoted to said second mentioned plate and extending through the slot of the sheet and the first mentioned plate and carrying latching means at its inner portion, the second mentioned plate being adjustably connected to the sheet, to take up wear and to afford variability in thetightness with which the door may be shut,

3. In mechanism of the class described, the combination, with a container having a marginal rabbet and a closure adapted to be seated in said-rabbet, the material of the closure and container at the place of the rabbet being formed with registering apertures when the closure is seated in the rabbet, a lever pivoted to the closure, and a wedge car ried by the lever in position to be swung through the registering apertures.

4. In mechanism of the class described, the combination, with a container having a marginal rabbet and a closure adapted to be seated in said rabbet, the material of the closure and container at the place of the rabbet being formed with registering apertures when the closure is seated in the rabbet, a lever pivoted to the-closure, and a wedge carried by the lever in position to be swung through the registering apertures, the wedge being formed with a locking notch.

In mechanism of the class described,

7 the combination, with a container having a marginal rabbet and a closure adapted to be seated in said rabbet, the material of the clo sure and container at the place of the rabbet being formed with registering apertures when the closure is seated in the rabbet, a lover pivoted to the closure, and a wedge carried by the lever in position to be swung through the registering apertures, the wedge being formed with a locking notch in its edge located to engage material bordering the registering slots for functioning as a detent against withd 'awal of the wedge.

6. In mechanism of the class described, the combination with a container and a closure therefor, the container being formed with a rabbet for receiving the closure and the closure being adapted to be seated in the said rabbet, of a plate adjustably engaging the closure and having outstanding ears, a pair of levers pivoted to the said ears and extending into the closure, the closure being slotted to accommodate the levers, a handle connecting the outer portions of the levers, and hook wedges progecting trom the inner portions of the levers, the rabbeted portion of the container being apertured to receive said hook wedges.

7. In oven fastening apparatus, the combination, with the insulating wall of an oven and an insulated door cooperating therewith, of an adjustable plate engaging the outer portion of the door, a stiffening plate for the door inward of the adjustable plate, the door and stifiening plate being slotted, a locking lever pivoted to the ad justable plate and extending through the said slots, the stiffening plate being formed with an outstanding tongue operating with portions of the door for stabilizing the same, and latching means carried by the lever and extending past said tongue, the oven being formed with means for, receiving said latching means.

8. In fastening devices for insulated ovens, the combination of an insulated oven wall having a rabbeted recess, and an insulated closure adapted to be seated in said recess, the closure comprising spaced inner and outer sheets, of a plate exterior of said outer sheet, a stifi'ening plate within the outer sheet and connected thereto, means adjustably connecting the said first mentioned plate to the stifi'ening plate, a lever pivoted to the said first mentioned plate and extending through the outer sheet to the area between the sheets, and latching means extending from the lever between said plates in position for engaging the oven wall, said oven wall being formed with means for receiving said latchingmeans, 7

9. In fastening devices for insulated ovens, the combination of an insulated oven wall having a rabbeted recess, and an insulated closure adapted to be seated in said recess, the closure comprising spaced inner and outer sheets, of a plate exterior of said outer sheet, a stifiening plate within the outer sheet and connected thereto, means adjustably connecting the said first mentioned plate to the'stiffening plate, a lever pivoted to the said first mentioned plate and extending through the outer sheet to the area between the sheets, and a wedge extending from the free inner end portion of the lever and adapted to have locking engagement with the oven wall the oven wall being apertured to receive said wedge.

In testimony'whe'reof I aflix my signature.

HENRY A. ZIOLA.

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